#100B39#100B39

#100B39 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.4% C 0.085 H 279.9°. Best body text is #FFFFFF at 18.60:1 contrast (WCAG AA passes).

Color values

HEX	#100B39
RGB	rgb(16, 11, 57)
HSL	hsl(247, 68%, 13%)
HSV	hsv(247, 81%, 22%)
CMYK	cmyk(71.9%, 80.7%, 0%, 77.6%)
CIE-LAB	lab(5.82, 18.05, -28.51)
CIE-LCH	lch(5.82, 33.74, 302.33°)
OKLab	oklab(19.43% 0.0146 -0.0834)
OKLCH	oklch(19.43% 0.085 279.9)
XYZ	xyz(1.0716, 0.6448, 3.9381)
Luminance	0.0065 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B39 #34390B

analogous

#0B1D39 #100B39 #270B39

triadic

#100B39 #39100B #0B3910

tetradic

#100B39 #390B1D #34390B #0B3927

square

#100B39 #390B1D #34390B #0B3927

split-complementary

#100B39 #39270B #1D390B

monochromatic

#07051A #07051A #100B39 #1E156C #2D1FA0

Accessibility & contrast

On white

18.60

#100B39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#100B39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B39

18.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B39	#FFFFFF	#000000	##FFFFFF
##100B39	1.00	18.60	1.13	18.60
#FFFFFF	18.60	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00153A

Deuteranopia (green-blind)

#001138

Tritanopia (blue-blind)

#001720

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #100b39;
/* rgb */ color: rgb(16, 11, 57);
/* oklch */ color: oklch(19.4% 0.085 279.9);

Tailwind

colors: {
  custom: {
    50: '#544b70',
    500: '#100b39',
    950: '#000000',
  },
}

SCSS

$custom: #100b39;
$custom-light: #544b70;
$custom-dark: #000000;

JSON

{
  "hex": "#100b39",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 57
  },
  "hsl": {
    "h": 246.522,
    "s": 67.647,
    "l": 13.333
  },
  "oklch": {
    "l": 0.19428,
    "c": 0.08464,
    "h": 279.9
  },
  "luminance": 0.00645
}

Semantic roles & 50–950 ramp

primary

#100B39

secondary

#6E762A

accent

#EB3DD8

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030107

muted

#78777A

Preview Lab

Preview with #100B39

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →